| /* |
| * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #include "webrtc/modules/audio_processing/utility/block_mean_calculator.h" |
| #include "webrtc/test/gtest.h" |
| |
| namespace webrtc { |
| |
| TEST(MeanCalculatorTest, Correctness) { |
| const size_t kBlockLength = 10; |
| BlockMeanCalculator mean_calculator(kBlockLength); |
| size_t i = 0; |
| float reference = 0.0; |
| |
| for (; i < kBlockLength - 1; ++i) { |
| mean_calculator.AddValue(static_cast<float>(i)); |
| EXPECT_FALSE(mean_calculator.EndOfBlock()); |
| } |
| mean_calculator.AddValue(static_cast<float>(i++)); |
| EXPECT_TRUE(mean_calculator.EndOfBlock()); |
| |
| for (; i < 3 * kBlockLength; ++i) { |
| const bool end_of_block = i % kBlockLength == 0; |
| if (end_of_block) { |
| // Sum of (i - kBlockLength) ... (i - 1) |
| reference = i - 0.5 * (1 + kBlockLength); |
| } |
| EXPECT_EQ(mean_calculator.EndOfBlock(), end_of_block); |
| EXPECT_EQ(reference, mean_calculator.GetLatestMean()); |
| mean_calculator.AddValue(static_cast<float>(i)); |
| } |
| } |
| |
| TEST(MeanCalculatorTest, Reset) { |
| const size_t kBlockLength = 10; |
| BlockMeanCalculator mean_calculator(kBlockLength); |
| for (size_t i = 0; i < kBlockLength - 1; ++i) { |
| mean_calculator.AddValue(static_cast<float>(i)); |
| } |
| mean_calculator.Reset(); |
| size_t i = 0; |
| for (; i < kBlockLength - 1; ++i) { |
| mean_calculator.AddValue(static_cast<float>(i)); |
| EXPECT_FALSE(mean_calculator.EndOfBlock()); |
| } |
| mean_calculator.AddValue(static_cast<float>(i)); |
| EXPECT_TRUE(mean_calculator.EndOfBlock()); |
| EXPECT_EQ(mean_calculator.GetLatestMean(), 0.5 * (kBlockLength - 1)); |
| } |
| |
| } // namespace webrtc |